Lock nut



ci. 23, 1923. 1,471,462 I I D. c. HARRIS LOCK NUT Filed June 1 1.922

. panying drawing.

Damien o. miners, or

vmcmra, aarmamora.

' nook area.

Application meg June 1,

To all whom it may concern: 4 I

Be it known that I, DANIEL C. Haunts, a. citizen of the United States, residing at Virginia, in the county of Saint Louis and State of Minnesota, have invented certain new and useful Improvements in Look Nuts,

the nut and within the path of the thread: of

of which the following is a specification, reference being had therein to the accom- This invention relates-to nuts and screw threaded bolts and more particularly to' an automatic locking device for such.

The principal object is to provide an improvement over similar'devices in the art.

Other objects and advantages of the invention will appear in the further description thereof.

Referring to the accompanying drawing formin part of this application in which like re erence characters indicate like parts:

Figure l is an elevation of a fragmental portion of a bolt having one of the improved nuts applied thereto with the locking device in operative position;

Figure 2 is a perspective view of the lockin device or key member:

Figure 3 is an inside elevation of the nut shown in Figure 1 with the key in position:

Figure 4-is an outside elevation of a nut with a slightly modified arrangement of ke mounting: and

Figure 5 is an edge elevation of the nut shown in Figure 4:, with the key removed.

The bolt 1, used in'connection with my improved locking nut, is provided with a plurality of longitudinal notches 2, preferably six or more andgapproximately one-half the depth of the thread of the bolt.

In the nut 3, shown in Figures 1 and 3, the locking key 4 is mounted upon the circumferentialface of the nut ad'acent the in nor or impin 'ng wall 5 thereo though it is not of a wi th to engage the object being impinged as such would interfere with, the functioning of the key. The. key is made of a flat piece of sprin steel bent to conform with one of the angu ar sides of the nut and made sufliciently contractile as to its up osite ends to snugly. fit within the recessesv ormed therefor in the circumferential face of the nut.

The key for ordina will be made substantia ly the nut upon which it is inner'edge of the key is formed by force'- fully shearing therefrom, a depending uog practical purposes half the width 01' the nut. This used, and, from the iaaa. Serial no; scams,

6, which, when in active position on the nut protrudes longitudinally of and within the nclined slot 7 formed on the inner faceof ositioning of the key and do will cause the iting, free end of the latter to protrude within the threaded portion of tions being designed to fit within the con caved recesses 10 and 11 respectively. However, the terminations 8 and 9 difler i s'omewhat in that the turned up edge as at 12 which does not coincide with the wall of its respective recess, which is to permit of a sharp instrument being placed thereunder and when prying op-' eration under the edge practiced the entire key 4 may be quickly re nut.

A cut-away or stepped portion is formed upon the circumferential wall of the nut intcrinediate of the concaved recesses 10 and 11 into which the key 4 fits with its outer surface flush with the outer wall of the nut so as not to interfere? in any way with the or the successful operation of the same.

By this means it is evide t that the nut may be successfully screwed upon thebolt while the key is in position, but any attempt to unscrew the same will be opposed by the dog 6 engaging the notches 2 in the thread of the bolt, and that thenut cannot be unscrewed without removin the key, this being readily accomplishe with the proper type of instrument. There is obviously thus afforded a. very convenient and practical form of lock nut.

In the making of the nut with the proper recesses and channels for cooperation with the spring key, I have confined myself to the most practical construction possible, in that all of such peculiarities in the formation of the nut may be accomplished by a single operation and'drop forging of the blank nut.

In Figures 4 and 5 I have shown a m0dification of the combination key and nut in of the recess 10 isv eased from operable engagement with the latter has an abruptly 'channel 1 on the tiive 21f u on Eat face. 0211;: x

imam f at; face upon the ad.- a (mum a HHTLTOW shannel 1- nansvcrse f f ince, 0114: and hf which opens inte the cut-away pardon 125, and the opposite and min the concuvml vece'ss 11; all of his peculiar Qmpiny; of the: nut being adjacent 0m) comer of the uni-m 1112* 0% ha nut, instead of the inne fay, as prviously described and the ridge 1? being left outsifie of that part of thQ key sent 1!; is to provide again t d lodgin s)? of the key longimdinally of the axis of the nut,

In the We difieren't 5503:1115 of 1 Hated, it is eviden; *thai they are 1 left in z'espsct t0 each M11811.

The principai abject 110+ "farming; (be my fiat aces of he acfix tional ex the nut is sinmh' h; avoid pense in doing so. as in ihsi n nurture m? the nuts these channels are mi 1 out and. fad. to he machire such P'MFPQJSQ r51 wntimwus few; the "forming; of ihe chum-e1 on one side only being: simply mfficwnt to guard against accidsn al loss of Wm i zev.

Having; thus describwi my in'vcznii m.

iii; inte file character described, emu-i0: W 5015711861 into a plumhfy of 113%, Early l) u 105ml laces, stepped or cutaway mm. on has of "1145 adfiacem; faces mar;

nut, two concaved revs (t inner face of the one (each ieimnmtion of the stepped pm iions am? axially pm'al id with the hole a nut an inclined channel on the it lace 0. 1" the nu? 0119 end c which Te". .5

10 mile; in J portions 21115 :1 cenfimctilia in the hale in the nut anr U flml swim; .11 of i mid n ,SlfbS in Mebtimon W1 sigzwiui'a m fine presenc 1 i g L 

